RA/DEC (2000)
16:25:20.298 +25:12:45.35
246.334575769 +25.2125985399
Type
SN Ia
Redshift
0.064
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-08-14 22:17:13.632
TNS AT
Y
Public
Y
Discovery Mag
17.938
Filter
wide-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), M. R. Alarcón, J. Licandro, P. Nichita (IAC), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)

Spectra

 SN_2025tws - 2025-08-22 05:19:50 Lick-3m / KAST (UCSC)z=
Show H at z=vexp= km/s
Show He at z=vexp= km/s
Show He II at z=vexp= km/s
Show C II at z=vexp= km/s
Show C III at z=vexp= km/s
Show C IV at z=vexp= km/s
Show N II at z=vexp= km/s
Show N III at z=vexp= km/s
Show N IV at z=vexp= km/s
Show N V at z=vexp= km/s
Show O at z=vexp= km/s
Show [O I] at z=vexp= km/s
Show O II at z=vexp= km/s
Show [O II] at z=vexp= km/s
Show [O III] at z=vexp= km/s
Show O V at z=vexp= km/s
Show O VI at z=vexp= km/s
Show Na at z=vexp= km/s
Show Mg at z=vexp= km/s
Show Mg II at z=vexp= km/s
Show Si II at z=vexp= km/s
Show S II at z=vexp= km/s
Show Ca II at z=vexp= km/s
Show [Ca II] at z=vexp= km/s
Show Fe II at z=vexp= km/s
Show Fe III at z=vexp= km/s
Show Å at z=vexp= km/s
Show Å at z=vexp= km/s
Show Å at z=vexp= km/s
Show Å at z=vexp= km/s
Show Tellurics 
Show Galaxy lines at z=
Show WR-WN at z=vexp= km/s
Show WR-WC/O at z=vexp= km/s
   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ATLAS-TDO_ATLAS-05_wide
 PS1_GPC1_i
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
21854 2025-08-22 05:19:50 Lick-3m / KAST K. Taggart K.Taggart UCSC tns_2025tws_2025-08-22_05-19-49.60_Lick-3m_KAST_UCSC.flm Object We measure a Si II 6355 velocity of -11,300 km/s.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-08-10 23:31:14 - 2025-08-14 22:17:14 2460898.48002 - 2460902.42863 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508847 2025-08-14 22:17:14 2460902.42863 17.938 0.1 19.72 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
508846 2025-08-10 23:31:14 2460898.48002 18.5 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot [Last non detection]
i-P1 PS1_GPC1 2025-08-09 08:32:59 - 2025-08-09 08:32:59 2460896.85624 - 2460896.85624 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
510297 2025-08-09 08:32:59 2460896.85624 18.94 0.08 20.7 ABMag i-P1 PS1_GPC1 45 Robot
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
266607 2025-08-19 17:41:20 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 16:25:20.298 +25:12:45.35 2025-08-09 08:32:59.136 18.94 i-P1 PSN PS25gqs Pan-STARRS N
265868 2025-08-15 00:30:55 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 16:25:20.319 +25:12:45.24 2025-08-14 22:17:13.632 17.938 wide-ATLAS PSN ATLAS25jly ATLAS 2025TNSTR3206....1T N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21854 2025-08-23 21:04:29 Kirsty Taggart K. Taggart, K. C. Patra, R. J. Foley (UCSC) UCSC SN Ia 0.064 1 UCSC 2025TNSCR3348....1T
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
21854 2025-08-22 05:19:50 Lick-3m / KAST K. Taggart K.Taggart UCSC tns_2025tws_2025-08-22_05-19-49.60_Lick-3m_KAST_UCSC.flm Object We measure a Si II 6355 velocity of -11,300 km/s.

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 266607 of Group Pan-STARRS
Previous RA, DEC: 16:25:20.319, +25:12:45.24 (246.3346625, +25.21256625)
Updated RA, DEC: 16:25:20.298, +25:12:45.35 (246.334575769, +25.2125985399)